Hello Fyers,
Sorry if this appears irrelevant to the topic, but all this has a point. Hopefully you must've gotten that by now.
Your business, as much as a broker, is also a retailing business. When you look at business improvement strategies, you look as much as at the bigger established brokers as at successful online retailers.
There will always be competition, cut throat competition. Some will copy your marketing strategies, some will offer better rates, some will offer the same trading tools that you do etc..etc. And all the time you will have customers clamouring for more - more discounts, more facilities, more of everything.
So, while your 30-day challenge is a great scheme, keep it up, but keep it barebones. There will be other marketing schemes in future. Maybe some month you will offer discounts to all the customers, sometime you may offer post-facto rewards, maybe 3 months free for new members and whatever your marketing department thinks of.
What will make the real difference in the long run, apart from discounted brokerage, is your trading tools and customer support. Retail customers turn into a mob when there is a problem - outage of any kind.